Isaias Rios
Clean Truck Check tester in Porterville, CA (Tulare County).
- OBD test
Isaias Rios appears on CARB's public list of credentialed Clean Truck Check testers. It lists OBD testing.
- Location
- Porterville, CA 93257
- County
- Tulare County
- Phone
- (661) 750-9857
- Mobile testing
- No (test at the shop)
- OBD testing
- Yes
- Smoke opacity (non-OBD)
- No
- Motorhomes
- No
- Credentialed testers
- 1
- Last verified
Call (661) 750-9857 Open in Google Maps
The street address is not published for this listing (mobile or home-based tester). Call to arrange the test.
Before you call
- Have your VIN, odometer reading and plate number ready.
- Your vehicle must be registered in CTC-VIS and the annual compliance fee paid; the tester submits the result to CARB.
- Ask for the price per vehicle. Typical published prices for an OBD test are $50–$135 per vehicle (see cost guide).
Which trucks Isaias Rios can test
The test CARB requires depends on the engine's fuel and model year. Based on the services Isaias Rios lists on CARB's tester list:
| Your vehicle | Test required | This tester |
|---|---|---|
| Diesel, model year 2013 or newer | OBD scan | Yes |
| Alternative fuel (natural gas, propane), 2018 or newer | OBD scan | Yes |
| Diesel, model year 2012 or older (no OBD) | Smoke opacity test (SAE J1667) plus visual inspection | Not listed |
| California-registered motorhome | Same test as above by engine year, once a year | Not listed |
For a 2012 or older diesel, the nearest listed tester with smoke opacity testing is Becca Davis in Porterville, about 1 mile away. See listing.
If you need a tester at your yard, the nearest listed tester that offers mobile testing is Becca Davis in Porterville, about 1 mile away. See listing.
Clean Truck Check testers in Tulare County
Isaias Rios is one of 62 testing businesses in Tulare County on CARB's public tester list. 53 of them offer mobile testing and 31 do smoke opacity tests. In Porterville itself there are 6 listed businesses, 5 of them mobile. All testers in Tulare County.
When your truck is due
Most trucks test twice a year, on a schedule tied to the DMV registration expiration date. CARB says OBD trucks move to four tests a year beginning October 2027. California-registered (non-commercial) motorhomes and agricultural vehicles test once a year. See the deadline guide. You can test up to 90 days before a deadline. Get a free email reminder before each one.
How to check a tester's credential
CARB publishes its Clean Truck Check tester list, where Isaias Rios appears as of November 1, 2026. Listing there is optional, so a missing name does not always mean a tester is not credentialed. After the test, check that the passing result shows for your vehicle in CTC-VIS; that is what counts for compliance.
Frequently asked questions
Does Isaias Rios offer mobile Clean Truck Check testing?
Not according to CARB's tester list; plan to bring the truck to the tester. The nearest listed mobile tester is Becca Davis (about 1 mile).
Can Isaias Rios test a 2012 or older diesel truck?
Isaias Rios does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is Becca Davis (about 1 mile). Trucks from 2013 on get an OBD scan instead.
How much does Isaias Rios charge for a Clean Truck Check?
Isaias Rios has not published prices with us; call (661) 750-9857 for a quote. Published California prices are usually $50–$135 per vehicle for an OBD test and $190–$200 for a smoke opacity test, plus CARB's annual fee ($32.13 in 2026). See the cost guide.
Is Isaias Rios a CARB-credentialed tester?
Isaias Rios appears on CARB's public Clean Truck Check tester list, last checked November 1, 2026. Only credentialed testers can submit results to CARB; after the test, confirm the passing result shows for your vehicle in CTC-VIS.
Other testers near Porterville
-
Becca Davis
- Mobile testing
- Smoke opacity
-
Coast Counties Peterbilt Porterville
- Mobile testing
- OBD test
- Smoke opacity
- Motorhomes
-
DeBoer and Sons Trucking
- Mobile testing
- OBD test
- Smoke opacity
- Motorhomes
-
J’s Heavy Emissions Testing
- Mobile testing
- OBD test
- Smoke opacity
- Motorhomes
-
Jackie Scruggs jr
- Mobile testing
- OBD test
- Smoke opacity
- Motorhomes
-
Alcantar Truck and Diesel Services
- OBD test
- Smoke opacity
Source: CARB's public Clean Truck Check tester list, last checked . Listing on CARB's list is optional for testers, so some credentialed testers are not shown. Services, hours and prices change; please confirm with the tester before you go. Something wrong? Send a correction.